Does anyone know what this black mark on my lip is? Started last August so it's I've had it nearly a year, was living in Spain at the time for 6 months A brown macule on the vermilion border of the lower lip. Download Scientific Diagram In the process of removing a Labial Melanotic Macule. A Labial Melanotic Macule is a well defined, oval, brown to black, flat patch on the central third of the lower lip, as seen Pigmented Oral Lesions: Clues to Identifying the Potentially Malignant Consultant360 LaugierHunziker syndrome: a report of three cases and literature review International Journal of Oral Science